bssgp: These routines are not public API.. make them static for now
diff --git a/src/gprs_bssgp_pcu.cpp b/src/gprs_bssgp_pcu.cpp
index 4326303..a0ef206 100644
--- a/src/gprs_bssgp_pcu.cpp
+++ b/src/gprs_bssgp_pcu.cpp
@@ -112,7 +112,7 @@
 	return ms_class;
 }
 
-int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg, struct tlv_parsed *tp)
+static int gprs_bssgp_pcu_rx_dl_ud(struct msgb *msg, struct tlv_parsed *tp)
 {
 	struct bssgp_ud_hdr *budh;
 
@@ -307,7 +307,7 @@
 }
 
 /* Receive a BSSGP PDU from a BSS on a PTP BVCI */
-int gprs_bssgp_pcu_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx)
+static int gprs_bssgp_pcu_rx_ptp(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx)
 {
 	struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
 	uint8_t pdu_type = bgph->pdu_type;
@@ -355,7 +355,7 @@
 }
 
 /* Receive a BSSGP PDU from a SGSN on a SIGNALLING BVCI */
-int gprs_bssgp_pcu_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx)
+static int gprs_bssgp_pcu_rx_sign(struct msgb *msg, struct tlv_parsed *tp, struct bssgp_bvc_ctx *bctx)
 {
 	struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
 	int rc = 0;
@@ -414,7 +414,7 @@
 	return rc;
 }
 
-int gprs_bssgp_pcu_rcvmsg(struct msgb *msg)
+static int gprs_bssgp_pcu_rcvmsg(struct msgb *msg)
 {
 	struct bssgp_normal_hdr *bgph = (struct bssgp_normal_hdr *) msgb_bssgph(msg);
 	struct bssgp_ud_hdr *budh = (struct bssgp_ud_hdr *) msgb_bssgph(msg);